Home / 139,186.23-208,593.45-72,486.51

Finding the Fourth Proportional to 139,186.23, 208,593.45 and 72,486.51

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Solution

The fourth proportional to 139,186.23, 208,593.45 and 72,486.51 is: 108,632.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,186.23 : 208,593.45 = 72,486.51 : x
  2. Step 2: Convert to fraction form
    139,186.23/208,593.45 = 72,486.51/x
  3. Step 3: Cross multiply
    139,186.23x = 208,593.45 × 72,486.51
  4. Step 4: Simplify right side
    139,186.23x = 15,120,211,199.36
  5. Step 5: Solve for x
    x = 15,120,211,199.36/139,186.23
  6. Step 6: Final answer
    x = 108,632.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.